Question Explanation help

<p>I can’t figure out why these are the right answers to the questions. Thanks. </p>

<li>Most people prefer the abridged version of Boswell’s Life of Johnson for the simple reason _____________</li>
</ol>

<p>Answer: that it is much shorter than the original
My answer: of it being much shorter than the original work</p>

<li>Some African ________ are now used in Western medicine as well
Ans: plants used locally for centuries to treat common ailments
My Ans: plants, by which common ailments were treated locally for centuries,</li>
</ol>

<p>For #4:</p>

<p>The answer is more concise and it seems to flow better by using “that it is” instead of “of it being”. </p>

<p>For #15:</p>

<p>Same thing pretty much; the answer is shorter and it flows much better than the phrase that uses “by which”</p>